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Finding the Fourth Proportional to 902.94, 1,245.23 and 570.80

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Solution

The fourth proportional to 902.94, 1,245.23 and 570.80 is: 787.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.94 : 1,245.23 = 570.80 : x
  2. Step 2: Convert to fraction form
    902.94/1,245.23 = 570.80/x
  3. Step 3: Cross multiply
    902.94x = 1,245.23 × 570.80
  4. Step 4: Simplify right side
    902.94x = 710,768.20
  5. Step 5: Solve for x
    x = 710,768.20/902.94
  6. Step 6: Final answer
    x = 787.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.